I just came cross the "Landmark System Speed Test" and ran it on my XT, which has a V20/8087 combo installed. I had assumed they had been working in Tandem fine, but upon running this software it detected no FPU. I opened the box, made sure the DIP switch was set properly for it (it was) and tried again - sitll no FPU. I tried the DIP switch in the wrong setting, and still no FPU. I have now pulled the 8087 and am curious as to if it were dead to begin with... Should I trust Landmark? Is there any way to tell if it's dead for sure?